Patent GB-191202249-A (GB)
Title: Improvements in and relating to Sheet Feeding Mechanism for Rotary Printing and like Machines.
Inventor: GREEN CHARLES FREDERICK
IPC: B65H3/06
Filed: 1912-01-29
Granted: 1913-01-29
Abstract: 2249. Green, C. F. Jan. 29. Sheet-registering devices; sheet-separators; pile tables.-Sheets are fed to rotary printing- machines, duplicators, &c., from spring- pressed table with a front bar for registering the sheets and a pivoted knife - edged plate which normally retains the sheets below an oscillating roller, but allows the sheets to be engaged by the roller just before the end of its backward motion, the top sheet being fed over this knife-edged plate on the forward motion of the roller. As shown, the sheets are placed on a table 9 attached to brackets 12, which are supported on an arm 10 attached to a shaft 20 carried by two plates 20<a> pivoted at 20d in side frames a of the machine, and the bottom portions of the brackets 12 are pivoted to arms 11 clamped to a bar 23. This method of supporting the table 9 ensures its having a parallel motion, and further the pivots 20<b> are arranged at the mean height of an arm 18 on the table, with which the arm 10 engages. The table 9 is pressed upwards by a spring 24 secured to an arm 20x of one plate 20<a>, and attached to a fixed stud 25. The sheets are registered against a front bar 36, which may be adjustable horizontally at each end, so as to permit it to be arranged at a slight angle to the printing-line if desired, or to be perfectly square therewith, and the side register is obtained by a gauge 38, adjustable on a screwed rod 37. The backs of the sheets are registered against a cross rod 27 on a frame c, which is detachably secured to the brackets 12 and assists in supporting the sheets. The sheets are normally held below a feed-roller 1 by means of a plate 41, Fig. 3, with a knife-edge, which is carried by an hexagonal portion of a rod 40, which is controlled by a roller 42 on an arm 41, Fig. 7, and a cam - surface 43 carried by the printing- drum 3. This cam permits the plate 41 to rise, and thereby permits the pile to engage the feedroller 1, just before the roller 1 completes its backward motion. This motion is imparted to the roller 1 by a cam-actuated sector 4, Fig. 7, and after the roller 1 has fed the front edge of the top sheet backwards to a slight extent, thereby causing it to buckle under the action of the roller and a pressing-rod 14, the plate 41 is lowered and, on the reversal of motion of the roller 1, the sheet is fed over the plate 41 to the printing-drum. The bar 36 is notched to permit descent of the plate 41. The pressing-rod 14 is formed integral with rods 13, and may be secured in either of the slots 15 in a pivoted frame 12<a>, Fig. 12. This frame is so constructed that, when a handle 31 is operated to depress the feed-table for the insertion of a new pile, pins 30<a> on arms 30<b> are on portions 13<c> of the frame 12<a> and raise the frame. The table 9 is depressed by a crank 32, pin 33, and link 34 connected to a projection 35 on the arm 10. The blade 41 is prevented from rising after the table 9 has been charged, by a pivoted gravity catch 44, which holds a projection 45 on the arm 41, Fig. 7, until a pin 46 on the sector 4 engages a projection 47 on the catch and frees the lever in proper time for the sheets to engage the roller 1. The catch 44 then remains inoperative until the table 9 is again depressed. For paper which is too thick to buckle, the stop 27 is replaced by a stop 48, Fig. 9, slotted at 49 to permit the top sheet to be moved bodily backwards by the roller 1 prior to being fed forwards. This stop is preferably carried by the arms 13, and is formed with an adjustable plate 50 which controls the effective height of the slot. A removable delivery table is provided.